Packing-ring.



W. H. KEYS. I

PACKING R'ING.

APPLICATION HLED H. JNE 1, I915.

-1,173,810.. I Patented Feb.29, 1916.

N T-Ensures PATENT OFFICE. v.

H. KEYS, OF ST. IiOUIS, MISSOURI.

a plication filed une 1, 1915. Serial No. 31,443.

Toalt whom it may concern Beit 'known that I,'--:VV:ILLIAM H. KEYS, a citizen of the Unitei States,- residing at ..the'-' city of St. Louis and State of Mis- --o"' sb"liri', have invented a new and useful Packg-Ring, ofiwhich-the following is a specification.

This invention relates to packing rings for reciprocating pistons.

a0. T An object of the invention is to provide 'an-improved packing ring consisting-of an. inner-open resilient ring having circumferential grooves formedin the-periphery thereof,in combination with two open resilient it rings encircling the innerwring and having mternalflanges seated in' said grooves and -bearingagainst the bottom walls of said grooves, sothat. the inner ring imparts outward pressure against said flangeswhich support the outer rings in such position with respectto-the inner ring that bindingdor sticking of-the outer rings 'in connecjfiz'm with the inner ring is prevented.

4. 3 1 Another object of the invention isto provide sin-improved packing comprising an.

inner ring provided with circumferential grooves, in com'bm'ation with twoouter rings provided with internalflanges seated in said grooves and being of less width than 80 saidgrooves, so that spaces or passages are:

provided, thus, enabling the flanges to support the outer'rings and to permit free relative'expandin'g'movement of-the outer rings to conform-with the varying surfaces of the interior "of" the cylinder, and interlocking crnecti'o'ns between the outer rings, whereby fthey are'f. retained in substantially the some annular plane.

."In the accompanying drawing, wherein I ,have illustrated a preferred embodiment of the-invention, Figure -1 is a view of a. piston 1 illustrating a number of the packing; rings mounted thereon. F ig; 2 is an elevation of the" ring. F ig. 3is an elevation looking to-:

ward the .periphe'ryof the ring. Fig. 4 is a sectional view of the ring approximately on the line 4-4'of Fig. 2. Fig. 5 is an enlarged sectional view on the hue 5-57-of Fig. 2.

The piston 1 is of the usual reciprocating type which operates within the cylinder 2.

-.'I he' piston-rod 3 is pivoted to the piston-at 4 and serves is transmit the power of the Specification of letters latent.

'piston tythmdru'm mechanism. This Pistols;

ed with the usualmumberflof cir- PACKING-RING.

Patented Feb. 29, 1916.

tion to receive the paoking'rlngs.

-.Each packing-consists of an inner open resilient ring 5'adapted to be seated in any one of the circumferential grooves formed in the plston, and having its side edges adapted to cooperate with the side walls oi the groove without binding or sticking, so that the full power of the resiliency of the ring will be free to impart outward pressure against the encircling outer rings throughout the operation of the piston. The

ring 5 is provided with two circumferential grooves 6 which receive flanges formed on the outer rings. I Both of the outer flange 8 which-seats in one of the grooves 6, thereby holding the ring 7 in position around the ring 5 and preventing lateral displacement of either of said rings with respect to the other. The ring 7 is thus retained around the ring 5 so that the side.

edges of the rings 5 and 7 are in the same plane.- It will be observed that the flange '8 is of somewhat narrower width than the groove 6 in which it is seated, so as to permit slight relative movement of the outer ring 7 with respect to the inner ring. The formation of the flange 8 of narrower width than .the groove =6 within" which the flange is seated, provides 'suflicient space at each side of said flange to prevent binding of the outer ring in connection with the inner ring under ifaces extending from the bottom of the groove to the inner and outer peripheries of the ring. These oblique cam surfaces cooperate with the adjacent outer ring as hereinafter explained. The outer ring 10 is also of open resilient type and is formed -with an internal flange 11 which engages within onepf the. grooves 6. The flange. 11

rings are of the open- -res1l1ent type,the ring 7 having an internal cui'nferential grooves formed in proper posiis of less width than the groove 6 in which I of the flange and pass entirely around the inner ring. thus constantly assuring free resilient action of the outer ring 10 with respect to the inner ring. The flange 11 bears against the bottom wall of the groove 6 in the same manner that the flange 8 bears against the bottom wall of the other groove 6. In this manner the expanding pressure of the inner ring is imparted to both of the outer rings through the medium of the flanges 8 and 11 which support the outer rings 7 and 10 free from the periphery of the inner ring 5 to enable the passage of a lu ricant between the outer and inner rings and to prevent binding or adhesion of the rings.

The inner edge 'of the ring 10 is formed with a V-shaped cam portion 12 which engages within the groove 9. The oblique walls of 'the cam portion 12 cooperate with the oblique walls of the groove 9, so that the expanding resiliency of each of the outer rings imparts pressure to the other outer ring. thus obtaining full efficiency of the resiliency of the outer rings and also of the inner ring because of the pressure imparted to the outer rings through the medium of the flanges'S and 11.

The combined width of the two outer ring is equal to the width of the inner ring, but the outer rings are permitted slight m ement with respect-to each other and with respect to the inner ring. because of the fact that the flanges 8 and 11 are somewhat narrower than the grooves 6 Within which said flanges are engaged. Also the formation of the flang s 8 and 11 upon the outer rings increases the resilient power of said rings and at the same time enables them to receive the entire pressure of the inner ring. whereas the reverse construction involving the provision of grooves in the outer rings not only reduces the resilient strength of the rings, but also reduces the thickness of the rings so that the total val e thereof is materially reduced.

The rings are assembled so that the open ends of the outer rings are remote from each other and from the open ends of the inner ring. thereby enabling the adjacent portion of each ring to close the open space between the ends of'the adjacent rin Rotation of the outer ringsiwith respect to each other and" with respect to the inner ring is'limited by projections 13 rigid with the inner ring and extending between the ends of the outer rings and constituting abutments therefor.

\Vhat I claim and desire to secure by Letters Patent of the United States is 1. In a packing. the combination of a resilient open inner ring having two separate circinnferential grooves formed in the periphery thereof, and two outer rings encircling said inner ring and having abutting side edges. an internal flange intermediate of the side edges of each ring engaging within one of said grooves and receiving the pressure exerted by the resiliency of said inner ring.

2. A packing, comprising an inner ring having two separate circumferential grooves, two outer rings encircling said inner ring. flanges intermediate of the side edges of said outer rings bearing against the hottrm walls of said grooves and supporting said outer rings away from said inner ring and receiving pressure imparted by said inner ring to leave a space between the adjacent peripheries of said outer and .in-

ner rings, and cooperating cam surfaces on the adjacent edges of said outer rings.

A packing. comprising a resilient open inner ring having two separate circumferential grooves in the periphery thereof,

two open resilient outer rings encircling said inner ring. flanges integral with said outer rings intermediate of the side edges thereof bearing against the bottom walls of said grooves. and receivingthe pressure imparted by the expanding resiliency of said inner ring and supporting said outer IIDgS free from said inner ring to leave a space between the adjacent peripheries of said outer and inner rings, and interlocking tongue and groove connection between said outer rings.

4. A packing. comprising a resilient open inner ring having twoseparate parallel cir-' cumferential groo es in the periphery there'- of. two open resilient outer rings encircling said inner ring. a. flange on each of said outer rings intermediate of the side edges thereof seated in one of said groo es and receiving pressure imparted by said inner ring and permitting movement of said outer rings laterally with respect to said inner ring. and means limiting relative rotation of saidouter rings and said inner rings.

In witness whereof. I have signed this specification in the presence of two'sub-- scribing witnesses. 1 i v WILLIAM H. -KEYS. Witnesses: v

L. C. KINGQLAND, BERNIE M. WA'rsoN. 

